IW4049UB
1
H
EX
B
UFFER
/C
ONVERTER
High-Voltage Silicon-Gate CMOS
The IW4049UB is inverting hex buffers and feature logic-level
conversion using only one supply (voltage (V
CC
). The input-signal
high level (V
IH
) can exceed the V
CC
supply voltage when these
devices are used for logic-level conversions. These devices are
intended for use as CMOS to DTL/TTL converters.
Operating Voltage Range: 3.0 to 18 V
Maximum input current of 1 A at 18 V over full package-
temperature range; 100 nA at 18 V and 25
C
Noise margin (over full package temperature range):
0.5 V min @ 5.0 V supply
1.0 V min @ 10.0 V supply
1.0 V min @ 15.0 V supply
High-to-low level conversion
ORDERING INFORMATION
IW4049UBN Plastic
IW4049UBD SOIC
T
A
= -55
to 125 C for all
packages
LOGIC DIAGRAM
PINS 13, 16 = NO CONNECTION
PIN 1 =V
CC
PIN 8 = GND
PIN ASSIGNMENT
NC = NO CONNECTION
FUNCTION TABLE
Inputs Output
A Y
H L
L H
IW4049UB
2
MAXIMUM RATINGS
*
Symbol Parameter
Value
Unit
V
CC
DC Supply Voltage (Referenced to GND)
-0.5 to +20
V
V
IN
DC Input Voltage (Referenced to GND)
V
CC
**
to +18
V
V
OUT
DC Output Voltage (Referenced to GND)
-0.5 to V
CC
+0.5
V
I
IN
DC Input Current, per Pin
10
mA
P
D
Power Dissipation in Still Air, Plastic DIP+
SOIC Package+
750
500
mW
P
D
r Dissipation per Output Transistor 100
mW
Tstg
Storage Temperature
-65 to +150
C
T
L
Lead Temperature, 1 mm from Case for 10
Seconds
(Plastic DIP or SOIC Package)
260
C
*
Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
+Derating - Plastic DIP: - 10 mW/
C from 65 to 125C
SOIC Package: : - 7 mW/
C from 65 to 125C
**
The IW4049UB has high-to-low level voltage conversion capability but not low-to-high level;
therefore it is recommended that V
IN
V
CC
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min
Max
Unit
V
CC
DC Supply Voltage (Referenced to GND)
3.0
18
V
V
IN
DC Input Voltage (Referenced to GND)
V
CC
**
18 V
V
OUT
DC Output Voltage (Referenced to GND)
0
V
CC
V
T
A
Operating Temperature, All Package Types
-55
+125
C
**
The IW4049UB has high-to-low level voltage conversion capability but not low-to-high level;
therefore it is recommended that V
IN
V
CC
This device contains protection circuitry to guard against damage due to high static
voltages or electric fields. However, precautions must be taken to avoid applications of any voltage
higher than maximum rated voltages to this high-impedance circuit. For proper operation, V
IN
and
V
OUT
should be constrained to the range GND
(V
IN
or V
OUT
)
V
CC
.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or
V
CC
). Unused outputs must be left open.
IW4049UB
4
AC ELECTRICAL CHARACTERISTICS(C
L
=50pF, R
L
=200k
, Input t
r
=t
f
=20 ns)
V
IN
V
CC
Guaranteed Limit
Symbol Parameter V
V
-55C 25C 125C Unit
t
PLH
Maximum
Propagation
Delay,
Input A to Output Y (Figure 1)
5
10
10
15
15
5
10
5
15
5
120
65
90
50
90
120
65
90
50
90
240
130
180
100
180
ns
t
PHL
Maximum
Propagation
Delay,
Input A to Output Y (Figure 1)
5
10
10
15
15
5
10
5
15
5
65
40
30
30
20
65
40
30
30
20
130
80
60
60
40
ns
t
TLH
Maximum Output Transition Time,
Any Output (Figure 1)
5
10
15
5
10
15
160
80
60
160
80
60
320
160
120
ns
t
THL
Maximum Output Transition Time,
Any Output (Figure 1)
5
10
15
5
10
15
60
40
30
60
40
30
120
80
60
ns
C
IN
Maximum Input Capacitance
-
-
22.5
pF
Figure 1. Switching Waveforms
EXPANDED LOGIC DIAGRAM
(1/6 of the Device)
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